65664211 has 2 divisors, whose sum is σ = 65664212. Its totient is φ = 65664210.

The previous prime is 65664199. The next prime is 65664223. The reversal of 65664211 is 11246656.

It is a balanced prime because it is at equal distance from previous prime (65664199) and next prime (65664223).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65664211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65664281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32832105 + 32832106.

It is an arithmetic number, because the mean of its divisors is an integer number (32832106).

Almost surely, 2^65664211 is an apocalyptic number.

65664211 is a deficient number, since it is larger than the sum of its proper divisors (1).

65664211 is an equidigital number, since it uses as much as digits as its factorization.

65664211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 65664211 is about 8103.3456670686. The cubic root of 65664211 is about 403.4374809407.

The spelling of 65664211 in words is "sixty-five million, six hundred sixty-four thousand, two hundred eleven".